A Neap tide occurs when the sun's influence partially cancels out the effect of the moon's control of the tides. The effect is strongest when the sun is at a ninety degree angle to the moon, imagine a clock face with the Earth in the middle...
http://wiki.answers.com/Q/When_does_a_Neap_tide_occurs
Spring tides occur during the full moon and the new moon.; Neap Tides; During the moon's quarter phases the sun and moon work at right angles, causing the bulges to cancel each other. The result is a smaller difference between high and low tides and is known as a neap tide.
home.hiwaay.net/~krcool/Astro/moon/moontides/ home.hiwaay.net/~krcool/Astro/moon/moontides/
A tide in which the difference between high and low tide is the least. Neap tides occur twice a month when the Sun and Moon are at right angles to the Earth. When this is the case, their total gravitational pull on the Earth's water is weakened because it comes from two different directions.
www.thefreedictionary.com/neap+tide www.thefreedictionary.com/neap+tide
The proxigean spring tide occurs at most once every 1.5 years. Neap Tides; Neap tides are especially weak tides. They occur when the gravitational forces of the Moon and the Sun are perpendicular to one another (with respect to the Earth).
www.enchantedlearning.com/subjects/astronomy/moon/Tides... www.enchantedlearning.com/subjects/astronomy/moon/Tides.shtml
A neap tide is a lower high tide that occurs during the first and last quarter phases of the moon. Neap tides ovvur near the time whenthe moon and the sun are lined up at right angles. Neap tides occur about twice each month when the moon is near its first & third quarters.
www.stclementschool.org/mammals/neap.html www.stclementschool.org/mammals/neap.html
(Click to enlarge) neap tide Neap tides occur when the sun, moon, and earth form a right angle and the gravitational pull of the sun counteracts the ... ; Neap tides occur when the sun, ... n.; A tide that occurs when the difference between high and low tide is least; the lowest level of high tide. Neap tide comes twice a month,
www.answers.com/topic/neap-tide www.answers.com/topic/neap-tide
Tides vary from day to day. As the earth, moon, and sun orbit, their positions constantly shift, causing slightly different gravitational effects. This causes the tides to occur at slightly different times. Tides also vary from place to place. ... Geographical position determines the level of tide. In Northern California...
www.sfgate.com/getoutside/1996/jun/tides.html www.sfgate.com/getoutside/1996/jun/tides.html
C. Neap tides occur twice a month at the moon's first and third quarters. The sun's and moon's gravities are pulling on the Earth at right angles to each other. Neap comes from the Anglo-Saxon word for "scant" or "lacking."
http://answers.yahoo.com/question/index?qid=20090607131...
About UKHO; Tide Tables; ... Spring tides occur when the gravitational forces of the Sun and Moon reinforce each other resulting in a higher than normal tidal range. Neap tides occur when these gravitational forces act at right angles to each other resulting in a lower than normal tidal range.
www.bbc.co.uk/weather/features/coast_sea/tidesfaq.shtml www.bbc.co.uk/weather/features/coast_sea/tidesfaq.shtml
Conversely, when the Sun and Moon form a right angle with the Earth, the Sun's gravitational pull on the oceans minimizes the effect of the Moon's pull to cause weak tidal fluctuations called neap tides. These occur when the Moon is in its quarters.
www.synapses.co.uk/astro/moon2.html